Vn entropy and mutual info shot vec validation check

[antalszava]

Adds a validation check for the shot-vector case of vn_entropy and mutual_info (#2819) - makes the required logic to be implemented.

[sc-23175]

[github-actions]

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[codecov]

Codecov Report

Merging #3180 (b55a5f0) into master (315ff3e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #3180   +/-   ##
=======================================
  Coverage   99.69%   99.69%           
=======================================
  Files         274      274           
  Lines       23885    23922   +37     
=======================================
+ Hits        23811    23848   +37     
  Misses         74       74           

Impacted Files	Coverage Δ
pennylane/_qubit_device.py	99.66% <100.00%> (+<0.01%)	⬆️
pennylane/operation.py	97.04% <100.00%> (+0.04%)	⬆️
pennylane/ops/op_math/composite.py	100.00% <100.00%> (ø)
pennylane/ops/qubit/hamiltonian.py	100.00% <100.00%> (ø)

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[rmoyard]

Thank you @antalszava it looks good to me 👍